Fixed bug with route runner being null when supplying uri to catcher

Fixed link?

Added coverage info

Changed docs to reflect new feature

Revert "Fixed catching bug"

This reverts commit a3dddd9.

Fixed catching bug

several modifications, see description

- fixed docblocks
- removed unnecessary `&` from `addRoute(Route &$route)` because object parameters are always passed as reference
- replaced self-references with `self::`
- replaced `array_merge` with spread operator
- replaced `boolval()` with `(bool)` typecast
- made anonymous functions static
- replaced `in_array()` with `array_key_exists()`
- removed unnecessary `EMIT_EMPTY_RESPONSE` in match as its value was the same as the default arm

Update README.md

Fixed warning when code given doesn't exist

Removed unneeded items for TOC